/Engine/Plugins/Experimental/GeometryScripting/Source/GeometryScriptingEditor/Public/GeometryActors/GeneratedDynamicMeshActor.h
Call this function from within OnRebuildGeneratedMesh to update progress tracking.
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category="DynamicMeshActor|Progress") void IncrementProgress ( int NumSteps, [FString](API\Runtime\Core\Containers\FString) Message )